[ownership] Change SILUndef to return Any ownership for trivial values and owned for non-trivial values.

This is in preparation for verifying that when ownership verification is enabled
that only enums and trivial values can have any ownership. I am doing this in
preparation for eliminating ValueOwnershipKind::Trivial.

rdar://46294760

include/swift/SILOptimizer/Utils/SILSSAUpdater.h

@@ -51,12 +51,15 @@ class SILSSAUpdater {
   // If not null updated with inserted 'phi' nodes (SILArgument).
   SmallVectorImpl<SILPhiArgument *> *InsertedPHIs;
 
+  SILModule &M;
+
   // Not copyable.
   void operator=(const SILSSAUpdater &) = delete;
   SILSSAUpdater(const SILSSAUpdater &) = delete;
 
 public:
   explicit SILSSAUpdater(
+      SILModule &M,
       SmallVectorImpl<SILPhiArgument *> *InsertedPHIs = nullptr);
   ~SILSSAUpdater();